While Manchester United and Southampton were busy playing Friday Night Football, Watford had its own focus on adding a pair of players to bolster its squad.
Kaboul joins the Hornets with a veteran background in the PL, most recently playing with Sunderland. The central defender started and played 90 minutes for the Black Cats in their opening day defeat against Manchester City on Saturday.
Meanwhile, Pereyra joins Watford on a five-year deal after spending time with reigning Serie A champions Juventus. The 25-year-old scored six goals in two seasons with the Italian club.Follow @MattReedFutbol